Molding-machine.



V. E. KNEGHT;

MOLDING MAGHINE.

APPLICATION FILED we. 21, 1907.

939,032. Patented Nov. 2, 1909.

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V. E. KNEGHT.

MOLDING MACHINE.

APPLIOATION mum AUG. 21. 1907.

939,032. Patented Nov. 2, 1909.

8 SHEETS-SHBET 2.

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[77 van/277'? V. E. KNEOHT.

MOLDING MACHINE.

APPLIOATION IILEDAUG. 21, 1907.

Patented Nov. 2, 1909.

ANDREW, a. mum co.. PHOYQLIYHOGRAFHERS. WASWNGTON. u c.

VICTOR E. KNECHT, OF CINCINNATI, OI-IIO.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented Nov. 2, 1909.

Application filed. August 21, 1907. Serial No. 389,559.

To all whom it may concern:

Be it known that I, VICTOR E. KNEOHT, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Molding-Machines,of which the following is a specification.

My invention relates to molding machines of the character employed inmaking molds for castings, and has for its object the providing of meansfor making stepped molds, in which the danger of injury to the mold maybe minimized, and further, the providing of a stepped pattern, aboutwhich the sand may be tamped, with means for releasing the pattern intelescoping sections, while the unreleased sections maintain the mold inmolded condition, the respective sections preferably representing theseveral steps of the pattern.

The invention will be further readily understood from the followingdescription and claims, and from the drawings, in which latter:

Figure 1 represents a side elevation of my improved device, partlybroken away, shown in connection with a truck'pit, the pattern being inraised position and extended relation. Fig. 2 is a front elevation ofthe same, showing the pattern in inverted position and partiallycollapsed relation. Fig. 3 is a central vertical section of thepattern-frame, showing the head in extended relation and uprightposition; and, Fig. at is a detail in central longitudinal sectionshowing the sliding connection between the pattern sections.

I have exemplified my invention as employed in making molds for castingso-called cone-pulleys, but the same may be employed in the forming ofmolds and cores of other various articles, in which a stepped formationdesired or in which off-sets are to be formed in the article, such forinstance as the steps or off-sets in the doors of safes and door-framestherefor.

1 represents the pattern-frame which is preferably supported ontrunnions 2- mounted in bearings 3 of standards t. The trunnions are onthe bed-plate 5 of the patternframe. This bed-plate supports a housing 6for the purpose hereinafter described. The housing is preferablyconnected with the bed-plate by means of a spider (3.

The pattern proper, in the present exem plification, comprises a minorcore-print section 7 and a major core-print section 8, betWGQIiWlliCllbody-sections 9, 10, l1, l2 and 13 are located. The body-section 9 isshown integral with the minor core-print section 7. Thesepattern-sections are arranged to telescope and form the pattern-head A.The movement of the sections is controlled by a central rod 14, which issecured to the minor core-print section 7 as by having threadedconnection 15 therewith. A sleeve 16 is guided by the rod and is securedto the body-section 10, as by having threaded connection 17 therewith. Asleeve 18 has sliding connection with a sleeve 16 and is secured to thebody-section 11, as by having threaded connection 19 therewith. A sleeve20 has a sliding fit about the sleeve 18 and is secured to thebody-section 12, as by having threaded connection 21 therewith. A sleeve22 has sliding connection with a sleeve 20 and is secured to thebody-section 13, as by having threaded connection- 23 therewith. Asleeve 2% has sliding connection with the sleeve 22 and is secured tothe major coreprint section 8, as by having threaded connection 25therewith. The sleeve 24 also has sliding connection with the housing.In this manner each of the pattern-sections is permitted to havelongitudinal sliding movement with relation to the otherpattern-sections, all of the pattern-sections being guided with relationto each other, so that their movements may be in true longitudinalparallel lines, that is to say, the axes of all the pattern-sections maybe maintained eoincident, so that when the pattern is extended as awhole a true pattern which has a common center or longitudinal axisthroughout may be formed, and so that further the various sections ofthe pattern may be withdrawn in true line while their axes aremaintained coincident for insuring that a true mold is made and thatdanger of injury to the mold by withdrawal of the pattern may beminimized; F or forming the slidingfit between the rod and inner sleeve,and between the other sleeves, I prefer to provide the respective endsof each of the sleeves with bushings 26 27 suitably secured thereto, andthe housing may be provided with similar bushings for the sliding-fit ofthe outer sleeve.

It has been a practice heretofore, in making molds of the charactershown in the present exemplilication, to employ an integral pattern formaking the entire mold and to withdraw this integral pattern as a wholefrom the mold, with the result that defective molds were made, the moldsoften being useless. For instance, in order to release the integralpattern it was the practice to tap the pattern, which was done byinserting a metal stem into the pattern and striking the same on itssides for vibrating the pattern to loosen it from the mold. This initself detrimentally afiected the true lines of the mold. Again theattempt to withdraw a comparatively large stepped pattern of this kindresulted in very frequent injury to the mold, especially at the steppedparts, as the pattern had a tendency to carry with it the sand of themold in these stepped parts and especially at the corners thereof. Thisold method was also tedious. In my improved device I avoid all theseobjections and provide means whereby a perfect mold may be quickly made,minimizing the danger of injury to the mold and maximizing the number ofmolds made within a given time.

The rod is preferably operated longitudinally by means of having aninternal. bore 28, a portion only of which may be threaded as shown at28, with which threaded portion a screw 29 engages, the screw being journaled in a bearing 30 at the outer end of the housing 6. Abevel-pinion 31 is on the screw and is meshed by a bevel-gear 32 on ashaft 83 journaled in a bearing 34 on a bracket 34 on the housing 6 andcarrying a hand-wheel 35 for operating the screw 29.

The rod is provided with a pin 36, (see Fig. 8) and the sleeves arerespectively provided with slots 37 38 39 40 41, the outer end walls ofwhich the pin is adapted to successively engage for moving therespective sleeves with the pin and rod in the disengaging movement ofthe latter. The pin is further guided in a slot 42 of the housing 6.These slots are consecutively of greater length, so that when the shaftis moved for withdrawing the pattern, the minor coreprint section andsmallest body-section are first withdrawn, the pin meanwhile moving inthe slot 37 of the sleeve of pattern-section 10. hen the pin strikes theouter end wall of this slot, the rod will on further withdrawingmovement, carry with it the pattern-section 10, the pin meanwhile movingin the slot 88 of the sleeve of patternsection 11 until the pin strikesthe outer end wall of said slot 38 and thereby carries thepattern-section 11 with it in its further withdrawing movement, theother body-sections and the major core-print section being successivelywithdrawn in similar manner.

The minor core-print section and the respective body-sections areprovided with outward projections 43 preferably in the form of flanges,and the major core-print section and the body-sections are provided withinward projections 44, preferably in the form of flanges, which areadapted to be engaged by the outward projections 43 when thepattern-head is expanded, for limiting the outward movement of therespective sections, andv in the exemplification shown, determining thewidth of belt-face of the respective steps of the cone-pulley. The minorcore-print section has a frusto-conical portion 45 and the majorcore-print section has a frusto-conical part 46 which form thecore-prints in the mold. The bed-plate is provided with an opening 47,into which the major core-print section is drawn when releasing thepattern from the mold, the major core-print section being also providedwith an annular face 48 adapted to fit the annular face 49 of theopening 47. This annular face 49 of the bed-plate acts as a stripper forpreventing damage to the mold adjacent to the frustoconical part 46. Thebodysections are also each provided with an annular face 50 adapted tofit in the opening formed at the inner wall of the respective flanges44. These faces may also be of other cross-sectional form. In thismanner a close joint is formed between the bed-plate and the pattern andthe respective sections ofthe pattern with each other for arresting sandwhich would otherwise seep into the interior of the pattern-head whenfilling the flask or tamping the sand. These oints aid in maintainingthe working parts of the pattern clean.

In order to relieve the body-sections on withdrawal of the same from themold, the outer faces of said sections are preferably slightly beveledtoward their outer ends, as shown at 52, the core-print sections beingbeveled as heretofore stated. This also prevents binding between therespective outer faces of the sections and the flanges within which theymove. The respective inner walls 53 of these flanges thereby also act asstrippers for each preceding section for preventing injury to the moldand breaking of the stepped corners of the same, and insuring that thepattern-sections shall respectively be cleanly withdrawn from the moldwith-out injury to the mold.

54 is a worm-wheel secured to one of the trunnions 2. A worm meshes thewormwheel. The worm is on a shaft 56 journaled in bearings 57 on upwardextensions 4' of one of the standards 4, a hand-wheel 58 being on theshaft for manipulating the same.

In operation, if it is desired to form a mold, the pattern-frame isturned so as to bring its pattern-head upwardly, the handwheel35 havingbeen manipulated for placing the pattern-sections in extended relation.The pattern-frame having been turned so. as

LIA

to present the pattern-sections upwardly, a flask 59 is positioned onthe bed-plate, pins 60 on the bed-plate being received by positioninglugs 61 on the flask for positioning the flask on the bed-plate. Moldingsand is now introduced between the flask and pattern and the sametainped. After the sand has been tamped for forming the mold, abottom-board 62 is clamped upon the flask, as by means of ordinaryfounders clamps 63. The hand-wheel 58 is then-turned for swinging thepattern-frame upon its trunnions and presenting the pattern-head withthe flask thereabout and the bottom -board clamped in position,downwardly, or in inverted position. A suitable truck 6st is then placedunder the bottom'board, preferably in manner so as to have thebottom-board and truck platform touch. I prefer to accomplish this byforming the truck with an adjustable platform (35 having posts 66slidable in bearings 67 of the truck-frame 68, an adjusting screw 69being journaled in a bearing 70 secured to the bottom-board, theadjusting screw being threaded into an in tern-ally threadedsocket-piece 71 secured to the truck-frame, a hand-wheel 7 2 being onthe adjusting screw 69 for raising and lowering the platform. IVhen theplatform has been raised so as to contact the bottom of thebottom-board, the hand-wheel 35 is manipu lated for first withdrawingthe minor coreprint section 7 and body-section 9 upwardly from its placein the mold, the body-section 9 being stripped by the flan e 44 of thepattern-section 10, the withdrawal of the said section continuing untilthe pin 36 engages the outer wall of the slot 37, when thepattern-section 10 will begin to move and be stripped by the liange 44;on the patternsection 11 until the pin impinges the upper end wall ofthe slot 38, when the patternsection 11 will begin to move and bestripped by the inwardly extending flange at of the pattern-section 12,which, with the patternsection 13 and the major coreprint section 8, aresuccessively withdrawn and stripped by the means heretofore described.

It will be noted that the major core-print section is provided with acavity 76 into which the pattern sections are substantially drawn, themovement of the major core-print section further drawing thepattern-head through the plate 5 so that, when the head is in collapsedrelation, it will be withdrawn from the mold and be in collapsedrelation adjacent the bed-plate For accommodating the outer ends of thesleeves the housing comprises the cap 77, into the cavity 78 of whichthe said outer ends are adapted to be drawn.

When the pattern-head has been collapsed, the bottom-board beingsupported upon the truck platform, the platform is lowered, whereby theflask, together with the mold, is

lowered away from the patternframe to sufficient extent to clear thelatter and the pattern-head. The truck is then removed from underthe-pattern-head and the pattern-head again extended by means of thehand-wheel 85, the pattern-frame being turned by means of the worm andworm-wheel for again presenting the pattern-head into upward posi tionready for the next mold to be formed. In order that the pattern whenraised and the flask thereabout, may be at convenient height for propermolding, I prefer to pr0- ride a pit 74 in which the trucks may bereceived, this permitting the axes of the trunnions to be broughtsufliciently low for conveniently filling and tamping the mold. I preferto run the trucks upon tracks 75, the trucks being received at one sideand discharged at the other side of the patternframe. I

Having thus fully described myinvention what I claim as new and desireto secure by Letters Patent is:

1. In a molding machine, the combination of a plurality of relativelytelescoping pattern-sections and a movable pattern-frame on which thesame are mounted, and means for telescoping said pattern-sectionsmovable with said pattern-frame.

2. In a molding machine, the combination of a swinging frame comprisinga bed-plate, a pattern-head comprising a plurality of telescopingpattern-sections to one side of said bed-plate and means for telescopingsaid pattern-sections arranged to the other side of said bed-plate, saidlast-named means be ing mounted for movement with said bedplate. 7

3. In amolding machine, the combination of a swinging frame comprising ahousin telescoping pattern-sections having telescoping extensions insaid housing, and means for causing telescoping movement of saidsections and extensions, said last-named means being mounted on andmovable with said swinging frame.

at. In a molding machine, the combination of a swinging frame comprisinga housing, telescoping pattern-sections having telescoping extensions insaid housing, means for causing telescoping movement of said sectionsand extensions, said last-named means being mounted on and movable withsaid swinging frame, and, said housing having a bore for accommodatingthe movement of the ends of said extensions.

5. In a molding machine, the combination of a swinging frame comprisinga housing, telescoping patternsections of relatively increasing diameterhaving telescoping extensions in said housing, means for causingtelescoping movement of said sections and ex tensions, said last-namedmeans being mounted on and movable with said swinging frame, the majorone of said sections having a cavity for receiving a plurality of saidsections upon the telescoping movement thereof, substantially asdescribed.

6. In a molding machine, the combination of a supporting frame, aswinging frame thereon, apatternhead on said swinging frame,saidpattern-hea d comprising a plural ity of relatively telescopingpattern-sections, strippers on the respective pattern-sections foradjacent pattern-sections, and means mounted on said swinging frame forswinging with relation to said supporting frame, said last-named meansrelatively moving said pattern-sections longitudinally for causingtelescoping thereof.

7. In a molding machine, the combination of telescopingpattern-sections, a central rod having attachment with one of saidsections and sleeves having attachment with others of said sectionssuccessively slidable upon said rod and sleeves.

8. In a molding machine, the combination of a pattern-head comprising aplurality of relative telescoping pattern-sections of relativeincreasing diameter, a rod having attachment with one of saidpatternsections, sleeves having attachment with others of said sectionsand surrounding said rod, a projection on said rod, said sleevesprovided with slots of successively greater length in which saidprojection is adapted to move, substantially as described.

9. In a molding machine, the combination of a pattern-head comprising aplurality of relatively telescoping pattern-sections, a rod havingattachment with one of said patternsections, sleeves having attachmentwith others of said pattern-sections, a housing for said rod andsleeves, a projection on said rod, said sleeves and housing respectivelyhaving slots of increasing lengths for said projection for limiting therelative movement between said rod and sleeves.

10. In a molding machine, the combination of pattern-head sectionscomprising a plurality of relatively telescoping patternsections, a rodhaving attachment with one of said pattern-sections, sleeves havingattachment with others of said pattern-sections, ahousing for said rodand sleeves, a projection on said rod, said sleeves and housingrespectively having slots of increasing lengths for said projection forlimiting the relative movement between said rod and sleeves, saidhousing having a cavity for receiving the ends of said rod and sleevesupon collapsing movement of said pattern-sections.

11. In a molding machine, the combination of a swinging pattern-framecomprising a bed-plate and a housin secured thereto, a pattern-headcomprising a plurality of pattern-sections of relatively increasingdiameter, said sections having abutments between them, said sectionscomprising extensions in said housing, and means mounted on and movablewith said pattern-frame for successively moving said extensionslongitudinally for causing collapsing or extending movement of saidpattern-head, substantially as described.

12. In a molding machine, the combination of a swinging pattern-framecomprising a bed-plate and a housing secured thereto, a pattern-headcomprising a plurality of pattern-sections of relatively increasingdiameter, said sections having strippers for adjacent sections, saidsections comprising extensions in said housing and having abutmentsbetween them, and means mounted on and movable with said pattern-framefor successively moving said extensions longi-' tudinally for causingcollapsing or extending movement of said pattern-head, substantially asdescribed.

13. In a molding machine, the combination of a pattern-frame comprisinga bedplate and a housing having a hub transversely spaced from saidbed-plate, a pattern-head comprising a minor core-print section and amajor core-print section with body sections therebetween, said sectionsarranged to relatively telescope, a rod having connection with saidminor core-print section, sleeves respectively having connection withthe others of said sections and having successive sliding connectionwith said rod and with each other and said hub, a screw, said rod andrespective sleeves successively having abutments between them for causinsuccessive longitudinal movement of sai sleeves from said screw,substantially as described.

14:. In a molding machine, the combination of a pattern-frame comprisinga bedplate and a housing having a hub transversely spaced from saidbed-plate, a pattern-head comprising a minor core-print sec tion and amajor core-print section with body-sections therebetween, said sectionsarranged to relatively telescope, a rod having connection with saidminor-core-print section, sleeves respectively having connection withthe others of said sections and having successive sliding connectionwith said rod and with each other and said hub, a screw, said rod andrespective sleeves successively having abutments between them forcausing successive longitudinal movement of said sleeves from saidscrew, and strippers on said sections acting on adjacent sections,substantially as described.

15. In a molding machine, the combination of a patternframe comprising abedplate and a housing having a hub transversely spaced from saidbed-plate, a pattern-head} comprising a minor core-print section and amajor core-print section with body-sections therebetween, said sectionsarranged to relatively telescope, a. rod having 1 connection with saidminor core-print secesaosa tion, sleeves respectively liaying connectionwith the others of said sectionsand having successive sliding connectionwith said rod and with each other and said hub, a screw, said rod andrespective sleeves successively having abutments between them forcausing successive longitudinal movement of said sleeves from saidscrew, and strippers on said sections, said housing having a cavity atits end for receiving the ends of said shaft and sleeves upon collapsingmovement of said head, substantially as described.

16. In a molding machine, the combination of a swinging pattern-framecomprising a base-plate and a housing, said housing comprising a hub, apattern-head comprising a major core-print section and a minorcore-print section with intermediate bodysections, said sections havingextensions in said hub, means swinging with said patternframe forlongitudinally moving said sections, limiting means between saidextensions for successively causing movement of one from the other, atrunnionsupport for said frame, and means for causing swinging of saidframe on said trunnion, substantially as described.

17. In a molding machine, the combination of a supporting frame, aswinging pattern-frame thereon, a collapsible patternhead on saidswinging pattern-frame, means mounted on and swinging with saidpatternframe for causing said collapse, and a pit for said patternliead,said pattern-frame supported relatively to said pit for causing amolding about said pattern-head to be received by said pit,substantially as described.

18. In a molding machine, the combination of a supporting frame, aswinging frame, telescoping pattern-sections mounted on said swingingframe, a molding flask thereabout, a pit, said frame mounted forswinging at said pit for causing said flask to be received by said pitby the swinging of said frame, means between said supporting frame andswinging frame for causing the swinging of said last-named frame, andmeans mounted on and movable with said swinging frame for longitudinallymoving said telescoping pattern-sections.

19. In a molding machine, the combination of a frame, a pattern-headthereon comprising pattern sections at one end of said frame, means fortelescoping said patternsections, operating means for the latter at theother end of said frame, said frame arranged for receiving a flask aboutsaid head, a pit at which said frame is mounted, and means for swingingsaid frame for causin said flask or operating means to be receivec bysaid pit.

20. A molding machine comprising a rotatably mounted patterncarryingplate, a

flask, means for releasably securing said flask to said plate, acollapsible pattern carried by said plate, and means for collapsing andexpanding said pattern.

21. A molding machine comprising a rotatably mounted pattern-carryingplate, a collapsible pattern on said plate, means for collapsing andexpanding said pattern, a. flask-section adapted tobe placed upon saidplate to surround the expanded pattern, a bottom plate for saidflask-section, and means for clamping said bottom plate to saidflask-section and said flask-section to said plate.

In testimony whereof, I have subscribed my name hereto in the presenceof two subscribing witnesses.

VICTOR E. KNEGHI.

Witnesses EARLE R. PASSEL, FLORENCE QUINN.

